Appendix A Sun Cluster Geographic Edition Properties for Hitachi TrueCopy and Universal Replicator
This appendix provides the properties of Sun Cluster Geographic Edition data replication device groups.
This appendix contains the following sections:
Note –
The property values, such as True and False, are not case sensitive.
Hitachi TrueCopy and Universal Replicator Properties
The following table describes the Hitachi TrueCopy and Universal Replicator properties that the Sun Cluster Geographic Edition software defines.
Table A–1 Hitachi TrueCopy and Universal Replicator Properties|
Property |
Description |
|---|---|
|
Data Replication Property: Cluster_dgs (string array) |
Lists the device groups where the data is written. The list is comma delimited. Only applications that belong to the protection group should write to these device groups. The Sun Cluster device groups listed in the cluster_dgs protection group property must exist and have the same name on both the primary cluster and the secondary cluster. Tuning recommendations: This property can only be tuned when the protection group is offline. Category: Optional Default: Empty |
|
Data Replication Property: Nodelist (string array) |
Lists the host names of the machines that can be primary for the replication mechanism. This list is comma delimited. Tuning recommendations: This property can be tuned at any time. Category: Optional Default: All nodes in the cluster |
|
Device Group Property: Fence_level (enum) |
Defines the fence level that is used by the device group. The fence level determines the level of consistency among the primary and secondary volumes for that device group. Possible values are Never and Async. To use the data or status fence levels, contact your Sun representative. Note – If you specify a Fence_level of never, the data replication roles do not change after you perform a takeover. For more information about setting this property, see How to Add a Data Replication Device Group to a Hitachi TrueCopy or Universal Replicator Protection Group. Tuning recommendations: This property can only be tuned when the protection group is offline. Category: Required Default: None |
|
Data Replication Property: Ctgid (integer) |
Specifies the consistency group ID (CTGID) of the protection group. Once the CTGID of a protection group has been set, all Hitachi TrueCopy or Universal Replicator device groups thereafter added to the protection group either must be uninitialized or must already have the same CTGID as the protection group. Attempting to add an initialized device group to a protection group results in an error if the CTGID of the device group differs from the CTGID of the protection group. A device group with the same CTGID as a protection group must be added to that protection group. Tuning recommendations: This property can only be tuned at creation. Category: Optional Default: None |
Hitachi TrueCopy and Universal Replicator Properties That Must Not Be Changed
The Sun Cluster Geographic Edition software internally changes some properties for the SUNWscgreptc resource type. Therefore, you must not edit these properties manually.
For Hitachi TrueCopy and Universal Replicator, do not edit the following properties:
-
Dev_group – Specifies the Hitachi TrueCopy or Universal Replicator device group that contains the volumes that are being replicated.
-
Replication_role – Defines the local data replication role.
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